Pump device



G. JOHNSTON PUMP DEVICE May 31, 1949. 2,411,753

2 Sheets-Sheet 1 Filed July 12, 1946 c r c Mlm un@ /1 3/ llll/ll' 30 gama/nto@ l May' 31 1949 G. .JOHNSTON l 2,471,753

PUMP DEVICE Filed July 12, 1946 2. Sheets-Sheet 2 FIG. 8.

meme May 31, 1949 UNITED STATES PATENT oF/Flc-E Appueatipn July 12, 194s, serial Nu. 683.033

(ci. 10s-sv) 3 Claims. 1

This invention relates to Dump devices, and more particularly to a pump requiring no packing between the driving and driven parts.

A main object of the invention is to provide a novel and improved fluid pump which is very simple in construction, eiiicient in perfomance and not subject to leakage due to wear.

A further object of the invention is to provide a, pump device which is especially adapted to be employed as a circulating pump for engine cooling liquid or for other uses where a centrifugal pump is required, said device having a magnetic coupling between the driving and driven parts whereby the necessity of huid-tight packing therebetween is eliminated and wherein labor in installation and expense in manufacture is minimized. y

Further objects and advantages of the invention will become apparent from the following description and claims, and from the accompanying drawings, wherein:

Figure 1 is a cross-sectional view of a pump device constructed lin accordance with the present invention.

Figure 2 is an elevational detail view of the drive means for the pump device of Figure 1.

Figure 3 is an elevational view of the pump device of Figure 1, viewed from the side opposite the drive means thereof.

Figure 4 is an elevational detail View of the driven element of the pump device of Figure 1.

Figure 5 is a cross-sectional View taken on line 5--5 of Figure 4.

Figure 6 is a cross-sectional view of a further embodiment of a pump device according to the present invention.

Figure'? is an elevational view of the pump device of Figure 6.

Figure 8 is a plan view of a ring magnet employed in the pump device of Figure 6.

Referring to the drawings. II designates a housing formed with an axial intake passage I2 and a peripheral exhaust passage I3 as in av conventional centrifugal pump housing. The inner wall of housing II comprises a disc member I4 secured to the remainder of the housing and formed with an internal axial stud portion I5 and an external axial stud portion I6. Rotatably mounted on stud portion I6 is a sleeve member I1 formed with a ange portion I 8 having a further outer flange I9 formed at the end thereof. Positioned on ilange I8 and formed to receive and abut ange I9 is a ring member 20. Secured to ring member 20 are a plurality of radially extending bar magnets 2| arranged adjacent disc member I4. Encircling sleeve member I1 and bearingon ange I8 and ring member 20 is a spacer ring 22. Abutting spacer ring 22 is a pulley 23 which is rigidly clamped to sleeve member I1 by a clamping nut 24 threaded on said sleeve member and serving also to rigidly secure ring member 2liY to said sleeve member.

Sleeve member I1 is retained against endwise removal by a washer 25 which is secured to the end of stud portion I6 by a bolt 26. Bolt 26 carries an oil inlet tube 21, said bolt being hollow and communicating with a bore 28 formed in stud portion I6 and communicating with the surface of the inner stud portion I5 as well as the surface of the stud portion I6 for lubricating the stud surfaces.

Rotatively mounted on inner stud portion I5 a hub member 29 to which is secured a. plurality of radially extending bar magnets 430 arranged adjacent disc member I4 and angularly spaced in the same manner as the bar magnets 2|. The outer ends of the bar magnets alternate in polarity so that a north pole of a bar magnet 2I may be positioned adjacent a south pole of a bar magnet 30 to exert la maximum attraction thereon.

Secured to the radial edges of bar magnets 30 adjacent the inlet opening I2 is an annular disc 3I whereby said bar magnets define with said disc a fluid impeller structure.

When pulley 23 is rotated by a suitable prime mover, bar magnets 2i exert motor attraction on bar magnets 30, causing the internal impeller' structure to rotate in unison with sleeve member I1. Fluid is thus drawn into opening I2 and expelled at outlet I3 by centrifugal action.

All parts of the structure except for the magnets are preferably made of non-magnetic material to minimize magnetic leakage. Disc member I4 and its associated stud portions are preferably made of non-conducting material such as plastic to minimize eddy current losses.

In the embodiment of Figure 6, 4I designates the outer segment of a pump housing, said outer segment being formed with an outlet passage 42. Secured to outer segment 4I is an inner segment 43 formed with an inlet passage 44 which is inwardly offset with respect to outlet passage 42. Integral with inner segment 43 is an inner axial stud 45 and an outer axial stud 46. Rotatively mounted on outer stud 46 is a sleeve member 41 formed with a hollow pulley 48 in which is secured an annular magnet 49 arranged adjacent the face Wall 52 of inner segment 43. Rotatively mounted on inner stud 45 is a hub tated by vanes 53 and expelled centrifugally from the pump through outlet passage 42.

As in the prior embodiment, all parts except the annular magnets are preferably made of non-magnetic material, and inner housing segment I3 is preferably made of non-conducting material to minimize eddy current losses.

While certain specific embodiments of iiuid pump structures have :been disclosed in the foregoing description it will be understood 'that various modifications within the spirit of the invention may occur to those skilled in the art. Therefore it is intended that no limitations be placed on. the invention other than as defined by the scope ofthe appended claims.

, What is claimed is:

1. A pump comprising a housing having an inlet and an outlet passageway therein, a stud carried by said housing 'and having one end projecting exteriorly of the latter, -apulley rotatably mounted on the projecting end of said stud, magnet means rotatably mounted on the projecting end of said stud and operatively connected to said pulley, a iluid impeller rotatably mounted on a -portion of the stud within said housing, and a second magnet means within said housing operatively connected to said impeller and coupled magnetically to said first magnet means for rotating said impeller as the pulley is rotated.

2. A pump comprising a housing having an inlet and an outlet passageway therein, a stud carried by said housing and having one end projecting exteriorly of the latter, a pulley rotatably mounted on the projecting end oi' said stud. a plurality of radially-extending bar magnets positioned intermediate said pulley and housing and operatively connected to said pulley, 'a fluid impeller rotatably mounted on a portion of the stud within said housing, and a second plurality oi radially-extending bar magnets arranged within said housing operatively connected to said impeller and coupled magnetically to said firstnamed plurality of bar magnets for rotating said impeller as the pulley is rotated.

3. A pump comprising a housing having an inlet and an outlet passageway therein, a stud carried by said housing and having one end projecting exteriorly of the latter, a hollow pulley rotatably mounted on the projecting end of said stud, an annular magnet positioned in said hollow pulley, and operatively connected to the latter, a fluid impeller rotatably mounted on a portion of the stud within said housing, and a second annular magnet positioned within said housing operatively connected to said impeller and coupled magnetically to said tiret-named annular magnet for rotating said impeller as the pulley is rotated.

GEORGE JOHNSTON.

REFERENCES l CITED The following references are of record in the iile of this patent: Y.

UNITED STATES PATENTS Number Name Date 591,395 Fay s Oct. 12, 1897 1,307,210 Newcomb ---f- June 17, 1919 2,033,577 Hunter Mar. 10, 1936 FOREIGN PATENTS 40 Number Country Date 192,618 Great Britain Feb. 8, 1923 

